In 2008, UNESCO proclaimed Mada'in Saleh as a site of patrimony,
becoming Saudi Arabia's first World Heritage Site.
The conclusion that can be taken from the evidences above is that the term‘Thamud'
was not applied to the groups that lived in Mada'in Saleh, such as Lihyanites and Nabataeans,
Mada'in Saleh(Arabic: مَدَائِن صَالِح,
translit. madāʼin Ṣāliḥ, lit.'Cities of Saleh'), also called Al-Ḥijr(Arabic: ٱلْحِجْر) or"Hegra", is an archaeological site located in the Sector of Al-'Ula within Al Madinah Region in the Hejaz, Saudi Arabia.
This suggestion is supported by ʿAbdullah ibn ʿUmar and Ibn Kathir who report that people
called the region of Thamud Al-Hijr, while they called the province of Mada'in Saleh as Ardh Thamud(Land of Thamud)
and Bayt Thamud house of Thamud.